package com.ly.util;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;


public class EnDeCode {

	/**
	 * 加密算法
	 * 
	 * @param txt
	 * @param key
	 * @return
	 */

	public String getMD5Str(String str) {
        MessageDigest messageDigest = null;     
        try {     
            messageDigest = MessageDigest.getInstance("MD5");     
     
            messageDigest.reset();     
     
            messageDigest.update(str.getBytes("UTF-8"));     
        } catch (NoSuchAlgorithmException e) {     
            System.out.println("NoSuchAlgorithmException caught!");     
            System.exit(-1);     
        } catch (UnsupportedEncodingException e) {     
            e.printStackTrace();     
        }     
     
        byte[] byteArray = messageDigest.digest();     
     
        StringBuffer md5StrBuff = new StringBuffer();     
     
        for (int i = 0; i < byteArray.length; i++) {                 
            if (Integer.toHexString(0xFF & byteArray[i]).length() == 1)     
                md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));     
            else     
                md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));     
        }     
     
        return md5StrBuff.toString();     
    }     

	public static void main(String[] args) {
		EnDeCode azdg = new EnDeCode();
		System.out.println(System.currentTimeMillis() / 1000);
		String clearText = "";// 明文
		String a1  = azdg.getMD5Str(clearText);
		System.out.println(a1);
	}

}